Ok guys, I was discussing cam timing with andrew on #ozdat (austnet IRC) tonight which inspired me to go away and have a look at the specs for my L28 cam and see if i couldn't work out how its working.
After drawing a pic i've decided that this cam is absolutely shithouse. Its a crow cam with the following specs: Adv duration: intake: 295 exhaust 298 Lobe separation: 108 Intake opens 41 deg BTDC, closes 75 deg ABDC Exhaust opens 78 deg BBDC, closes 40 deg ATDC Now according to my little diagram, this mean that of the 295 degrees in which the intake cam is open, only 62 of them are when the exhaust is closed. So for 232 degrees the intake charge is going straight out the exhaust!! What the?! After reading grape ape racing tech article on turbo camshafts, this cam sounds absolutely terrible for turbo's. http://www.grapeaperacing.com/GrapeApeRacing/tech/turbocams.cfm Black! Problem is, I can't think of why you would make a cam like this in the first place?! Am I on the wrong track or something? Dave --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
